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diff --git a/docs/DRIVER.gu256x64-372 b/docs/DRIVER.gu256x64-372 new file mode 100644 index 0000000..b840137 --- /dev/null +++ b/docs/DRIVER.gu256x64-372 @@ -0,0 +1,96 @@ +--------------------------------------------------------------------- +GraphLCD driver library + +The GU256X64-372 driver +--------------------------------------------------------------------- + +Description +----------- +The GU256X64-372 driver supports Noritake GU256x64-372 VFD displays. +The VFD is operating in its 8 bit-mode connected to a PC's parallel +port. + + +Wiring +------ +The GU256x64-372 driver supports the following connection on a parallel +port: + + printerport LCD other + ----------- ---------- ---------- + D0 (02) D0 (15) (Data Bit 0) + D1 (03) D1 (13) (Data Bit 1) + D2 (04) D2 (11) (Data Bit 2) + D3 (05) D3 (09) (Data Bit 3) + D4 (06) D4 (07) (Data Bit 4) + D5 (07) D5 (05) (Data Bit 5) + D6 (08) D6 (03) (Data Bit 6) + D7 (09) D7 (01) (Data Bit 7) + INIT (16) nWR (17) (Write) + nSEL (17) R/S (19) (Register Select, C/D) + GND (18) nRD (21) (Read) + GND (18) CSS (23) (Chip Select) + GND (18) GND (02) (Ground) + + +Configuration Parameters +------------------------ +The GU256x64-372 driver supports the following parameters in config +file: + +Device + Instead of using the direct output via port address (see Port), you + can use the parport device (/dev/parportX). The advantage over the + direct output via port address is that this works for non-root users + also. But it's a little bit slower. The modules ppdev.o, parport.o + and parport_pc.o must be loaded or compiled into the kernel. + +Port + Sets the port address of the parallel port. If this parameter is not + given, 0x378 is used. To use this direct output, the program that + uses the driver library has to be started with user 'root'. + +Width + Sets the horizontal size of the display. If this parameter is not + given, a default value of 256 pixels is used. + +Height + Sets the vertical size of the display. If this parameter is not + given, a default value of 64 pixels is used. + +UpsideDown + Rotates the display output by 180 degrees. This might be useful, if + the LCD is mounted upside-down. + Possible values: 'yes', 'no' + Default value: 'no' + +Invert + Inverts the display. + Possible values: 'yes', 'no' + Default value: 'no' + +Brightness + Sets the brightness of your display's backlight. + Possible values: 0 <= x <= 100) + Default value: 100 + +AdjustTiming + To get a timing that is as accurate as possible, the drivers measure + the time for port commands (see: benchmark in syslog). You might + decrease or increase the time to wait after port commands with this + parameter. Normally, there is no need to change this parameter. + Possible values: -50 <= x <= 50 + Default value: 0 + +RefreshDisplay + Normally, most of the drivers do not update the whole display, but + only the areas that have changed since last update. So it might be, + that some faulty pixels would stay a longer time. To avoid this, the + plugin makes a complete refresh from time to time. This parameter + defines how often a complete refresh will be done. + e.g.: A value of 5 means, that the plugin will make a complete + refresh on every 5th update. + A value of 0 completely disables complete refreshs. + Possible values: 0 <= x <= 50 + Default value: 5 + |